Electric charge adjusting method, device therefor, and mass spectrometer

(19)

(11)

EP 1 341 205 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	11.01.2006 Bulletin 2006/02

(43)	Date of publication A2:
	03.09.2003 Bulletin 2003/36

(21)	Application number: 02028044.2

(22)	Date of filing: 16.12.2002

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International Patent Classification (IPC):

H01J 49/04^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SI SK TR
	Designated Extension States:
	AL LT LV MK RO

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Priority:

27.02.2002 JP 2002050663

(71)	Applicant: Hitachi, Ltd.
	Chiyoda-ku, Tokyo (JP)

(72)	Inventors:
	Baba, Takashi, c/o Hitachi Ltd., Int. Prop. Group Chiyoda-ku, Tokyo 100-8220 (JP) Hashimoto, Yuichiro, c/o Hitachi Ltd., Int.Prop.Gr Chiyoda-ku, Tokyo 100-8220 (JP) Waki, Izumi, c/o Hitachi Ltd., Int. Prop. Group Chiyoda-ku, Tokyo 100-8220 (JP)

(74)	Representative: Beetz & Partner
	Steinsdorfstrasse 10 80538 München 80538 München (DE)

(54)	Electric charge adjusting method, device therefor, and mass spectrometer

(57) In an electric charge adjusting method and mass spectrometer, tandem linear ion traps (911, 912) are employed such that charge-reducing reactions occur in only one of the linear ion traps. An ion reaching a given charge value is selectively moved to another linear ion trap. Through MS/MS mass analysis, the structure of a biomolecule is analyzed very efficiently with high sensitivity via a simple analysis.

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